Speaking of typography and settings blocks of text in all-caps, Lena Groeger wrote a good piece for ProPublica:

Of course, if you’re trying to make something hard to read, then
all caps is the perfect choice. Companies that set safety warnings
in all caps may, intentionally or not, veil important information
from consumers.

Here’s a version of the Surgeon General’s Warning that appears in
Edward Tufte’s masterpiece Visual Explanations. The warning
appears on a cigarette billboard and has been artfully concocted
in ALL CAPS, underlined, and surrounded by a dark black border.